A minor but annoying point - when a pioneer builds an outpost it automatically jumps to the next avaiable unit (using auto turn) before you can build on the resources which were the reason you built the outpost...you then have to try to remember/search for where you built that outpost (since the pioneer unit no longer exists you can't just cycle through idle units to find it) in order to build on the resources.  This is further complicated by the fact (bug?) that the "hammer" symbol shows over both resources you have already built on AND resources you have not yet built on, making it hard to eyeball which resources you have left unbuilt.

In any event, I think it would be better if after building an outpost you could IMMEDIATELY build on the resources under its influence, rather than be auto-jumped away....